/*
 *     Android基础开发个人积累、沉淀、封装、整理共通
 *     Copyright (c) 2016. 曾繁添 <zftlive@163.com>
 *     Github：https://github.com/zengfantian || http://git.oschina.net/zftlive
 *
 *     Licensed under the Apache License, Version 2.0 (the "License");
 *     you may not use this file except in compliance with the License.
 *     You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 *     Unless required by applicable law or agreed to in writing, software
 *     distributed under the License is distributed on an "AS IS" BASIS,
 *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *     See the License for the specific language governing permissions and
 *     limitations under the License.
 */

package com.zftlive.android.library.widget.pulltorefresh.extras.viewpager;

import com.zftlive.android.library.widget.R;
import com.zftlive.android.library.widget.pulltorefresh.PullToRefreshBase;

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;

public class PullToRefreshViewPager extends PullToRefreshBase<ViewPager> {

	public PullToRefreshViewPager(Context context) {
		super(context);
	}

	public PullToRefreshViewPager(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	@Override
	public final Orientation getPullToRefreshScrollDirection() {
		return Orientation.HORIZONTAL;
	}

	@Override
	protected ViewPager createRefreshableView(Context context, AttributeSet attrs) {
		ViewPager viewPager = new ViewPager(context, attrs);
		viewPager.setId(R.id.widget_viewpager);
		return viewPager;
	}

	@Override
	protected boolean isReadyForPullStart() {
		ViewPager refreshableView = getRefreshableView();

		PagerAdapter adapter = refreshableView.getAdapter();
		if (null != adapter) {
			return refreshableView.getCurrentItem() == 0;
		}

		return false;
	}

	@Override
	protected boolean isReadyForPullEnd() {
		ViewPager refreshableView = getRefreshableView();

		PagerAdapter adapter = refreshableView.getAdapter();
		if (null != adapter) {
			return refreshableView.getCurrentItem() == adapter.getCount() - 1;
		}

		return false;
	}
}
